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Finding the Fourth Proportional to 115,485.80, 173,228.70 and 65,719.40

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Solution

The fourth proportional to 115,485.80, 173,228.70 and 65,719.40 is: 98,579.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,485.80 : 173,228.70 = 65,719.40 : x
  2. Step 2: Convert to fraction form
    115,485.80/173,228.70 = 65,719.40/x
  3. Step 3: Cross multiply
    115,485.80x = 173,228.70 × 65,719.40
  4. Step 4: Simplify right side
    115,485.80x = 11,384,486,226.78
  5. Step 5: Solve for x
    x = 11,384,486,226.78/115,485.80
  6. Step 6: Final answer
    x = 98,579.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.